For concrete slab filler material, concrete slab with concrete slab for a substrate with a writing material, and the substrate

摘要

PROBLEM TO BE SOLVED: To provide an embedding material which can be easily embedded by a prescribed depth in unhardened concrete for a base board in a condition of keeping levelness and in which a steam releasing or water draining opening part can also be reliably secured, and the base board to which the embedding material is fixed. ;SOLUTION: Recessed grooves opened to a side surface side are formed in large numbers on the reverse of an embedding material 1b being a foaming mold of synthetic resin, and among the recessed grooves, at least one recessed groove 32 is made deeper in a depth than the other recessed grooves 31. After the embedding material 1b is arranged on a surface of unhardened concrete 3 for a base board, the embedding material 1a is pressed down from above until a top surface of the shallow recessed groove 31 impactively contacts with an upper surface of the concrete. In its condition, the upper end of the deep recessed groove 32 is secured as a steam releasing or water draining opening part. When the concrete is solidified, the embedding material 1b is firmly and integrally formed in the concrete 3, and a base board for a concrete slab is manufactured.;COPYRIGHT: (C)1997,JPO